package com.icss.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.UnavailableException;

public class SetCharacterEncodingFilter implements Filter
{
	protected String encoding = null;

	protected FilterConfig filterConfig = null;

	protected boolean ignore = true;

	public void destroy()
	{
		this.encoding = null;
		this.filterConfig = null;
	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException
	{
		// Conditionally select and set the character encoding to be used
		if(ignore || (request.getCharacterEncoding() == null))
		{
			
			String encoding = selectEncoding(request);  
			//System.out.println(encoding+"...");
			//System.out.println(request.getParameter("groupname")); 
			if(encoding != null) request.setCharacterEncoding(encoding);
			//System.out.println(request.getParameter("groupname")); 
		}
		// Pass control on to the next filter
		//System.out.println("-----doing filter--------");
		chain.doFilter(request, response);
		
		
	}

	public void init(FilterConfig filterConfig) throws ServletException
	{
		this.filterConfig = filterConfig;
		this.encoding = filterConfig.getInitParameter("encoding");
		String value = filterConfig.getInitParameter("ignore");
		if(value == null)
			this.ignore = true;
		else if(value.equalsIgnoreCase("true"))
			this.ignore = true;
		else if(value.equalsIgnoreCase("yes"))
			this.ignore = true;
		else this.ignore = false;

	}

	protected String selectEncoding(ServletRequest request)
	{
		return (this.encoding);
	}
}
